#import <UIKit/UIKit.h>
typedef NS_ENUM(NSUInteger, XNButtonEdgeInsetsStyle) {
    XNButtonEdgeInsetsStyleTop, 
    XNButtonEdgeInsetsStyleLeft, 
    XNButtonEdgeInsetsStyleBottom, 
    XNButtonEdgeInsetsStyleRight 
};
@interface UIButton (XN)
- (void)layoutButtonWithEdgeInsetsStyle:(XNButtonEdgeInsetsStyle)style
                        imageTitleSpace:(CGFloat)space;
- (void)layoutButtonWithImage;
@end
